Summary
The aim of this study was to determine the link between structural geology and the hydrogeological system of the Numedalen valley from Kongsberg to Hvittingfoss (Buskerud county) within the framework of the GEOS program. Three main geological units are presented: (1) Precambrian basement, (2) Late Caledonian sedimentary fold-and-thrust belt and (3) Premian Oslo Rift, all having a very low porosity and intrinsic permeability. In such medium, the groundwater flow is expected to be heterogeneous, anisotropic and controlled by fractures. (...)
